1. Show Running App Mac
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3. Stop App Running On Mac Catalina

Stop Apps From Opening Automatically On Mac Using Dock. Follow the steps below to stop Apps from opening at Startup on your Mac, in case the app that is opening up automatically is located on the Dock of your Mac. Right-click on the App’s icon that you wish to stop from opening at startup. You can stop the spinning wheel and get back to a smooth Mac experience using one of these fixes. Force quit the active app. To determine whether the spinning wheel of death is the result of a single app, click off of it onto the Mac desktop and force quit the app. Restart it again, and there may be no problem.

All-mighty Mac system monitor

When your Mac slows down or starts behaving erratically, chances are it's because an application that's running, perhaps in the background, is misbehaving. And if it's not an application that's causing the problem, it will almost certainly be a process associated with macOS or an ancillary service.

Solving this problem is usually as simple as killing the process, but in order to do that you need to identify which one.Here's a comprehensive guide on how to view and kill processes on your Mac.

Best task killers for Mac

Try the best tools that help you find and kill processes hampering your Mac's performance.

How to show which processes consume a lot of memory

The easiest way to view all active processes running on your Mac is to launch Activity Monitor from your Applications folder. In the default CPU tab, you can see how much processing power every process takes, ranked by the most consuming. And if you switch to the Memory tab, you will see the same list ranked by the amount of used up RAM.

For more immediate and elaborate information on how your computer resources are consumed, use iStat Menus, which handily lives in your menu bar and, in its MEM table, shows you applications and processes that are consuming more than their fair share of RAM in real time.

How to kill process using Activity Monitor

1. Launch Activity Monitor.
   The easiest way to launch Activity Monitor is to press Command and spacebar to call up Spotlight, then start typing Activity Monitor. When it appears in Spotlight, hit Return to launch it. Alternatively, go to Utilities in the Applications folder and double-click on its icon. Or open Activity Monitor in one click through iStat Menus app.
2. View and filter tasks.
   You'll notice there are five tabs across the top of the Activity Monitor window: CPU, Energy, Memory, Disk, and Network. Clicking on any of those tabs organizes processes according to the percentage of the resource they are using. So, clicking on CPU lists tasks in the order of how much CPU capacity they're using. By default, processes are ordered starting with the one that's consuming the most of the resource at the top, so you can quickly see where problems are occurring or likely to occur. To flip the order, so that processes consuming the least of the resource are at the top, click the arrow next to Memory or CPU above the list of processes.
   
3. Kill problematic processes.
   When you identify a process that's causing a problem, either because it's hogging lots of CPU cycles or memory, or because it's highlighted in the Activity Monitor as having crashed, you need to kill it. To do that, click on the process first and then on the X in the Activity Monitor toolbar. The process will quit and free up the resources it was taking up. If it's a critical process, it will restart. If it's an application, it will remain shut down.

Activity Monitor alternatives

Get an advanced system monitor for macOS – an improved alternative to the default program.

How to shut down processes using Terminal

1. Launch Terminal. Press Command and spacebar to pull up Spotlight then start typing Terminal. When the Terminal app appears in Spotlight, tap Return to launch it. Alternatively, navigate to the Utilities folder in Applications and double-click Terminal.
2. View processes. When Terminal has launched, type 'top' into the Terminal window. You'll see a list of currently running processes. At the top of the list is an overview of the processes that are running and the resources they're consuming.
3. Kill an unwanted process. When you identify a process that's causing a problem or consuming too many resources, take note of the number in the PID column next to the name of the process. To kill the process, type 'kill -9' followed by the PID number. Press Enter. The problem process will now quit.

How to prevent problematic processes

You can pretty much avoid issues altogether by being a little bit proactive in hunting down the common culprits. Here, iStat Menus will help you identify which applications or processes are consuming finite resources, such as CPU and RAM.

Then, you can use CleanMyMac maintenance routines that, when run regularly, will keep you Mac running smoothly. Here's how to do that:

1. Launch Setapp and search for CleanMyMac.
2. Find the maintenance scripts. Under the Speed section in the left sidebar, click on Maintenance. You will see a list of tasks that CleanMyMac would suggest you to perform to optimize your Mac. You should try to run them all, but the one especially important for us is under Run Maintenance Scripts.
3. Run the maintenance scripts. Click on the checkbox next to Run Maintenance Scripts and then click Run. Alternatively, choose another specific maintenance script such as Speed Up Mail or Reindex Spotlight and click Run. When it's finished, click Select Tasks to return to the list of maintenance tasks.

Run other tasks, as necessary. If you're having problems with Mail, repeat step 3, but this time click the checkbox next to Speed Up Mail. Likewise, if Spotlight is running slowly, run the Reindex Spotlight task.

How to kill a background process

To kill a background process, use Activity Monitor. While the steps are the same as described in the 'How to kill a running process using Activity Monitor' section above, the key difference is that background processes often have obscure names that don't clearly describe what they do.

Be careful when killing a background process and, if not sure, leave it alone or search online for its exact role in your system. Otherwise, you might risk causes problems for your macOS. Generally, background processes don't tend to consume significant RAM or CPU cycles, so if you spot one that does, it has probably got into trouble. Kill it using the X in the Activity Monitor toolbar.

How to easily remove startup items

One common cause of Macs running slowly or having problems is items that launch automatically at startup. These could be helper apps for something like iTunes or just complete apps in their own right. They are also frequently apps you once used but no longer need.

To review the apps and helpers that startup when you log in

1. Launch System Preferences from the Apple menu and click on the Users & Groups pane.
2. Click the padlock and type in your password.
3. Then select your username in the left panel and click the Login Items tab.
4. Look through all the login items that correspond to apps you no longer use and then click the minus button. The app will no longer start up automatically when you log in.

How to Force Quit an application that's not responding

If you see the dreaded spinning beachball, or an app just won't do anything, you should force quit it.

There are several ways to force quit an unresponsive application:

1. Press Command-Alt-Esc and click on the application in the window that opens. Press Force Quit
2. Control-click or right-click on the application's icon in the Dock and choose Force Quit
3. Launch Activity Monitor, locate the application and press the 'x' in the toolbar
4. Locate the process in Activity monitor, look for the entry in the PID column and launch Terminal. Type 'kill -9' followed by the PID number. Press Enter

Fix crashing apps with Spindump

While Force Quit will fix the problem, it’s a temporary solution. If you’re determined to identify the source of crashing apps and prevent them from happening, use Spindump on Mac. It’s a hang reporting tool that alerts you about the crash and helps share the details with the app developer.

Whenever the app crashes, it will trigger Spindump and send the information to Apple or the app developer. Not only does it help you understand what just happened, but it also helps the developer track the conditions of app misbehavior — and fix it accordingly. A win-win.

How to create a Spindump file on Mac

1. Launch Activity Monitor via Applications > Utilities
2. Pick the app for which you want to create a Spindump file, then click on the Settings icon
3. Select Spindump or Run Spindump
4. Wait a few seconds for the file to generate
5. Click Save.

Reset a problematic app

There's one more thing you can try if an app keeps running slowly or crashing – reset it. Thanks to CleanMyMac, resetting an app is easy. Here's what you need to do:

1. Locate the uninstaller. In the left hand sidebar of CleanMyMac, click on Uninstaller under Applications.
2. Find the app that's causing a problem. Scroll through the list of apps until you find the one that's been crashing or running slowly. Click on it to highlight.
3. Reset the app. With the app highlighted, you'll see all the files associated with it in the right-hand window. Click Application Reset at the top of the window and all the files, except the main application file, will be selected.
4. Click Uninstall. All the selected files will be trashed, effectively resetting the application to its default state. When you launch it the next time, it will behave as if it has just been installed — so you'll need to recreate any custom settings or preferences.

If resetting the app doesn't work, the final resort should be to uninstall the app completely and reinstall it. To do that, click Complete Uninstallation in the same menu instead of Application Reset.

As you can see there are lots of different ways and apps that help you view and kill processes in macOS. iStat Menus is a great way to passively monitor which processes are causing problems, so you can launch Activity Monitor and quit them. And running CleanMyMac's maintenance scripts regularly prevents problems occurring in the first place. Best of all, all these apps are available to try for free on Setapp, along with over 200 high-quality macOS apps. So check your Mac for problematic processes now and see what you find.

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Meantime, prepare for all the awesome things you can do with Setapp.

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Ok, I get it. There is no equivalent to the PC’s Ctrl+Alt+Del shortcut on a Mac® to force quit an application. So how do I quit that annoying program that’s not responding?

Luckily, Apple® has you covered and gives you multiple options. The shortcut actually exists, and moreover, there are a few other extremely convenient ways to fight buggy apps. Today I’m going to list three easy ways to force-quit an application on a Mac, without harming the system.

Let’s dive in!

Is it Safe to Force Quit?

Forcing a frozen application to quit is the same as killing the symptoms when we get sick versus curing the virus. We need to see the bigger picture and understand what causes the problem and how to cure it while understanding how to avoid it from happening again.

The number one reason we have a problem with frozen applications in a Mac is insufficient RAM—or, in other words, a lack of computer memory to operate the system compared to the number of applications you usually open (including those numerous open tabs in a browser). So anytime your system utilizes all of its existing resourses to run the task, it becomes unresponsive. Think of RAM like a physical workbench. The more space (memory) you have to work, the more projects you can have out to work on. Less space? Less ability to work on multiple things at once.

Forcing Mac to quit the application does resolve the problem but may have downsides. When you close an application in the traditional manner, it will clean everything it runs in the background and alert you to save the work. When you force close on Mac, you may end up losing files and data, or mess things up on the drive. Although the effect will only be related to that one particular application that got stuck, sometimes it can hurt.

Using a smart app like Parallels Toolbox can help you to free up unused memory on the fly and prevent the applications from getting frozen over and over again. The package includes over 30+ useful apps for everyday needs that any Mac user will benefit from, including downloading videos and music from sites like YouTube, taking screenshot or record videos, optimize your Mac performance, free up extra space and so much more.

You can download Toolbox and try it out for free here (no registration needed).

1. Force Quit Using the Apple Menu

The most conventional and effective way to close frozen programs is to go to the macOS® menu bar, located along the top of the screen in the Finder menu.

To force quit an application, simply do the following:

1. Click on the black apple icon in the upper-left corner.
2. From the drop-down menu, select “Force Quit…”. You will be directed to the new window named “Force Quit Application” where all the magic happens.
3. Now all you have to do is select the application you want to close and choose “Force Quit.”

If you don’t know which application is stuck, pay attention to the ones that have the note “Not Responding.” This usually appears next to frozen applications.

2. Force Quit with Mac Shortcut

To do the same thing but faster, use Mac shortcut keys to close frozen applications.

1. On your keyboard, press and hold Command + Option + Esc. It will immediately bring up a “Force Quit Application” window.
2. Select the frozen application from the dialogue box and select “Force Quit.”

This could be your go-to method if the mouse or trackpad is lagging.

3. Close Application from Activity Monitor (Ctrl+Alt+Del Alternative)

Here’s the pinnacle of this article.

Very few Apple owners know that macOS provides an almost identical alternative to the traditional PC Control+Alt+Delete shortcut—and does it better. Yes, we all know that in Windows that keyboard shortcut is often used to open the Task Manager window. (To be honest, it’s needed too often, which is why we’re on a Mac.) From Task Manager, you can track applications, services, performance, and processes, and kill some of them when they’re unresponsive.

You can easily do all of that and more on the macOS native application called Activity Monitor.

To kill an application using Activity Monitor, do the following.

1. On your keyboard, press Command + Space, or click on Spotlight in the top-right corner of the screen.

2. In the “Spotlight Search” window, start typing “Activity Monitor.”

3. Once Activity Monitor is highlighted, hit Enter.

4. In the Activity Monitor processes list, select the application you want to quit and click “Force a process to quit” in the left corner.

What to Do If Force Quit Isn’t Working?

If all the applications stop responding and you can’t quit them using one of the methods described above, you can force your Mac to restart. To do so, press and hold the Control+Command+Power buttons.

Alternatively, you can force Mac to shut down by pressing and holding the power button, or use one of the many other shortcuts.

What’s the Solution?

Since your Mac doesn’t have enough space to run all those applications you need, the most obvious step would be to increase the RAM. If you own an iMac® or the older generation of MacBook Pro®, you can simply buy memory and upgrade your existing computer. With the new Mac generation, you don’t have that option anymore because the RAM is glued and soldered to the motherboard. You either buy a new computer or struggle.

Alternatively, you can clean your memory to free up space using Parallels® Toolbox. Parallels designed a tool set for macOS and PC users to efficiently manage their computer with just a few clicks—without any professional knowledge needed. Within the application (which is available to try for free), you can easily free up unused computer memory, clean your drive, and help your Mac run at max speed with a dozen other useful utilities.

Mac Running Hot

If you’re interested in learning how easily one click can save precious disk space, check out how much space I took back with the Parallels Toolbox tool Clean Drive:

In one click (and about 10 seconds), I successfully removed 4 GB of clutter and reclaimed space on my hard drive.

Stop App Running On Mac Catalina

So there you have it. Take care of your Mac with those quick tips, and remember to always save your work!